V2:
- added missing AC_ARG_WITH() for --with-virtualport
In this patch I am reworking the logic around detecting virtual port
support and requiring the libnl dependency.
- It requires --with-macvtap and displays an error in case of
--without-macvtap --with-virtualport.
- It tests for availability of certain data in include files and
displays an error in case the include file is not at the correct level
and --with-virtualport was chosen
- displays 'checking' messages for macvtap and virtualport support and
results
- libnl support is required when macvtap is found or requested; if libnl
is not there, please supply without-macvtap
Signed-off-by: Stefan Berger <stefanb us ibm com>